This Recommendation describes the real-time multimedia service testing framework at the user-tonetwork interface (UNI) in next generation networks (NGNs). This Recommendation defines the preparation for NGN multimedia service testing, physical configuration, test scenarios and test report production. The real-time multimedia service defined in this Recommendation covers services including voice and video communication, video conferencing and data sharing. Specifically, this Recommendation describes video communication service testing specifications. In the future, other multimedia services will be covered. The test check sheets described in clause 7.1 are useful for NGN operators, service providers and vendors when testing their services or products.